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water delivery to all of its citizens. when william penn laid out the city, he actually chose a spot of land that had a lot of groundwater. however, by 1730, 30,000 people lived within the first seven blocks of philadelphia, next to the delaware river. well, 30,000 people caused filth in the city and polluted their water sources. the groundwater was not potable. and in one year, 1/6 of the population died of yellow fever. now, they didn't know at the time that yellow fever was carried by mosquitoes. but the health issue was major in that first movement to build a water system. narrator: so they set out to find the cleanest source of water. although the majority of philadelphia's water now comes from the delaware river, early engineers found that development along the waterfront was causing pollution. so their search led them to the nearby schuylkill river. philadelphia developed technologies to pump water from the river into the city. these technologies established engineering concepts that are still the basis for our water systems today. europeans flocked here. it was a destination
vacates all wins of the penn state football team from 1998 to 2011. >> reporter: and accepted crippling sanctions. the closure came when jerry sandusky was finally put behind bars. the saints lost their coach when the nfl came down hard for bounties. and lance armstrong's legacy came off its wheels. his seven tour de france titles era erased. on the ice, nhl players and owners quickly forgot the stanley cup run as arenas stayed dark with winter approaching. >> usa! usa! >> reporter: summer provided more to smile about. in london, michael phelps became the most decorated olympian in history. american athletes follow his lead, winning 104 medals in all, 46 gold. and in the major leagues, three pitchers joined elite company. >> a perfect game for felix hernandez. >> that's a perfect game. >> perfect game! >> reporter: while tigers third baseman, miguel cabrera slugged his way to the first triple crown since 1967. the giants rallied back in two playoff series and swept the tigers in the fall classic to become world series champs. familiar faces in different places, old and new champions. le
Search Results 0 to 3 of about 4 (some duplicates have been removed)